Borderlands 2 - Claptrap's Secret Stash

Claptrap explains that he has a secret stash FAR away from his current location and that he will give it to you, if you complete a series of devious challenges. As he lists your objectives, your objective list should update as follows:

Collect 139,377 Brown Rocks

Kill Ug-Thak, Lord of Skags

Pilfer Lost Staff of Mount Schuler

Defeat Destroyer of Worlds

Dance, Dance, Baby

After this, your objective will reset to the simple 'Find Stash', the marker being right behind you, not even a five second walk away. Hit the use key on the marker to reveal a character bank that allows you to transfer items between your characters.